<template>
    <div class="login-container">
        <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on" label-position="left">

            <div class="title-container">
                <h3 class="title">十年磨二剑</h3>
            </div>
            <el-form-item prop="loginId">
                <span class="svg-container">
                  <svg-icon icon-class="user"/>
                </span>
                <el-input
                    ref="username"
                    v-model="loginForm.loginId"
                    placeholder="输入账号"
                    name="loginId"
                    type="text"
                    tabindex="1"
                    auto-complete="on"
                />
            </el-form-item>
            <el-form-item prop="loginPwd">
                <span class="svg-container">
                  <svg-icon icon-class="password"/>
                </span>
                <el-input
                    :key="passwordType"
                    ref="password"
                    v-model="loginForm.loginPwd"
                    :type="passwordType"
                    placeholder="输入密码"
                    name="password"
                    tabindex="2"
                    auto-complete="on"
                    @keyup.enter.native="handleLogin"
                />
                <span class="show-pwd" @click="showPwd">
                  <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'"/>
                </span>
            </el-form-item>
            <!--验证码-->
            <div class="captchaContainer">
                <el-form-item prop="captcha" class="captchaInputer">
                    <span class="svg-container">
                      <svg-icon icon-class="nested"/>
                    </span>
                    <el-input
                        ref="captcha"
                        v-model="loginForm.captcha"
                        type="text"
                        placeholder="输入验证码"
                        name="captcha"
                        tabindex="3"
                        auto-complete="on"
                    />
                </el-form-item>
                <div class="captchaImg" @click="getCaptchaFunc" v-html="svg"></div>
            </div>

            <div style="margin-bottom: 15px">
                <el-checkbox v-model="loginForm.checked">七天免登录</el-checkbox>
            </div>
            <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;" @click.native.prevent="handleLogin">登录
            </el-button>

            <div class="tips">
                <span style="margin-right:20px;">username: admin</span>
                <span> password: any</span>
            </div>

        </el-form>
    </div>
</template>

<script>
import { validUsername } from '@/utils/validate'
import { getCaptcha } from '@/api/captcha'

export default {
    name: 'Login',
    data() {
        const validatePassword = (rule, value, callback) => {
            if (value.length < 6) {
                callback(new Error('密码不能为空'))
            } else {
                callback()
            }
        }
        return {
            svg: '',
            loginForm: {
                loginId: 'admin',
                loginPwd: '123456',
                captcha: '',
                checked: false
            },
            loginRules: {
                loginId: [{ required: true, trigger: 'blur', message: '账号不能为空' }],
                loginPwd: [{ required: true, trigger: 'blur', validator: validatePassword }],
                captcha: [{ required: true, trigger: 'blur', message: '验证码不能为空' }]
            },
            passwordType: 'password',
            loading: false
        }
    },
    created() {
        this.getCaptchaFunc()
    },
    watch: {
        $route: {
            handler: function(route) {
                this.redirect = route.query && route.query.redirect
            },
            immediate: true
        }
    },
    methods: {
        // 获取验证码
        getCaptchaFunc() {
            getCaptcha().then(res => {
                this.svg = res
            })
        },
        showPwd() {
            if (this.passwordType === 'password') {
                this.passwordType = ''
            } else {
                this.passwordType = 'password'
            }
            this.$nextTick(() => {
                this.$refs.password.focus()
            })
        },
        handleLogin() {
            this.$refs.loginForm.validate(valid => {
                if (valid) {
                    this.loading = true
                    if (this.loginForm.checked) {
                        this.loginForm.remember = 7
                    }
                    this.$store.dispatch('user/login', this.loginForm).then(() => {
                        this.$router.push({ path: this.redirect || '/' })
                        this.loading = false
                    }).catch((res) => {
                        if (typeof res === 'string') {
                            this.$message.error('验证码错误')
                        } else {
                            this.$message.error('账号密码错误')
                        }
                        this.getCaptchaFunc()
                        this.loading = false
                        this.loginForm.captcha = ''
                    })
                } else {
                    console.log('error submit!!')
                    return false
                }
            })
        }
    }
}
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg: #283443;
$light_gray: #fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
    .login-container .el-input input {
        color: $cursor;
    }
}

/* reset element-ui css */
.login-container {
    .el-input {
        display: inline-block;
        height: 47px;
        width: 85%;

        input {
            background: transparent;
            border: 0px;
            -webkit-appearance: none;
            border-radius: 0px;
            padding: 12px 5px 12px 15px;
            color: $light_gray;
            height: 47px;
            caret-color: $cursor;

            &:-webkit-autofill {
                box-shadow: 0 0 0px 1000px $bg inset !important;
                -webkit-text-fill-color: $cursor !important;
            }
        }
    }

    .el-form-item {
        border: 1px solid rgba(255, 255, 255, 0.1);
        background: rgba(0, 0, 0, 0.1);
        border-radius: 5px;
        color: #454545;
    }
}
</style>

<style lang="scss" scoped>
$bg: #2d3a4b;
$dark_gray: #889aa4;
$light_gray: #eee;

.login-container {
    min-height: 100%;
    width: 100%;
    background-color: $bg;
    overflow: hidden;

    .login-form {
        position: relative;
        width: 520px;
        max-width: 100%;
        padding: 160px 35px 0;
        margin: 0 auto;
        overflow: hidden;
    }

    .tips {
        font-size: 14px;
        color: #fff;
        margin-bottom: 10px;

        span {
            &:first-of-type {
                margin-right: 16px;
            }
        }
    }

    .svg-container {
        padding: 6px 5px 6px 15px;
        color: $dark_gray;
        vertical-align: middle;
        width: 30px;
        display: inline-block;
    }

    .title-container {
        position: relative;

        .title {
            font-size: 26px;
            color: $light_gray;
            margin: 0px auto 40px auto;
            text-align: center;
            font-weight: bold;
        }
    }

    .show-pwd {
        position: absolute;
        right: 10px;
        top: 7px;
        font-size: 16px;
        color: $dark_gray;
        cursor: pointer;
        user-select: none;
    }
}

.captchaInputer {
    width: 70%;
}

.captchaContainer {
    display: flex;

    .captchaImg {
        width: 150px;
        height: 50px;
    }
}
</style>
